Writing-machine.



No. 856,870. PATENTEDJUNE 11, 1907.

E. B. HESS.

WRITING MACHINE. APPLICATION FILED SEPT. 1,1906.

2 SHEETS-SHEET 1.

$1 .1. fid@ INVENTOH ATTORNEY.

WITNESSES No. 856,870. PATENTED JUNE 11, 1907.

E. B. HESS.

WRITING MACHINE.

APPLIOATION rILnn SBPT.1,1906.

2 SHEETS-SHEET 2.

W/TNESSES lNVENTOH A TTOHNE) 45 rearwardly in a straight line through an ap- UNITED STATES PATENT OFFICE.

EDWARD B. HESS, OF NEW YORK, N. Y., AS SIGNOR TO ROYAL TYPEVVRITER COMPANY, OF HOBOKEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

WRlTlNG-IVIACHINE.

Specification of Letters Patent.

" .Eatented June. 11, 1907.

To all whom it may concern:

Be it known that I, EDWARD B. HEss, a citizen of the United States, residing in the borough of Brooklyn, city and State of New York, have invented certain new and useful Improvements in Whiting-Machines, of which the following is a specification.

This invention relates primarily to typebar actuating devices, particularly those for front strikemachines, whereby the touch of the keys improved and the several type-bars returned with celerity from the impression point.

Figure 1 is a longitudinal vertical sectional view illustrating the application of return springs to the type-bars; Fig. 2, a similar view showing the key lever partly depressed and the type-bar as having passed through the major part of its excursion to the print-- ing point; Fig. 3, a like view showing the type-bar at the printingpoint; Fig. 4, a diagrammatic .plan view illustrating a series of" type-bar springs and the two end bars of the series of type-bars; Fig. 5, a detail view of one of the type-bar springs of the kind shown in the foregoing figures.

The springs acting to retract the several type-bars from the printing point are so disposed, constructed or arranged that they are placed under tension only after the type-bar has completed the major part of its excursion to the printing point and is therefore more or less adjacent to such point: and preferably the springs come'int action only after the universal bar of the riiachinc has been set in motion.

A type-bar spring behaving in this way is indicated in Figs. 1, 2 and 3, in which a ind icates the usual cylindrical rotatable platen. The spring '1' is shown as attached to the heel of the type-bar outside of the point of connec tion thereto of the type-bar actuating link 0 the spring extends rearwardly and the metal of which it is composed is, beyond the convolutions of the spring, extended erture in a vertical plate 8 and is provided with an enlargement or stop at its end. In the normal position shown inFig. 1 the rear spring portion of the spring wire is projected a material distance through the aperture in" the late. Consequently, when'the key le-" ver is depressed and the type-bar moved t0- ward the rinting point, the spring is not placed unc er tension until the enlargement or-projection r abuts against the rear face of the-plate. This position of the parts is indicated in Fig. 2. As thetype-bar continues its movement to the printing oint, the spring 1' is laced under tension as s own in Fig '3 and, y its reaction, quickly draws the type-bar from the printing point when thefinger piece is released.

Fig. 4 shows a series of springs ar ranged in trough-like formation, conforming generally to'the curve of the type bar segment. They are all formed with straight rearward extensions which each ass through an aperture in the plate s and at the'extreme rear end the wire is double curled, into two eyes, forming a stop or limiting head 1", or as shown in Fig. 5, an adjustable head t may be fixed upon the wire ofthe spring at any desired point bymeans of a set screw andoperates as a stop contacting with the rear face of the plate 8 to limit the free forward movement of the spring. tween the heels of the type-bars and the plate 8 in a machine of the general character illustrated may be such that the coiled parts of the several springs may be staggered and yet eachbe perfectly free in its movement.

The distance be- Thus the convolutions of one spring are arranged alongside of the straight part of'thc wire of the adjacent spring. This permits of the springs being placed ina space equal in width with the length of a line connecting the heels of the two outer type-bars.

The springs it applied to the front links 1: of each type-bar actuating connection may be a relatively light one and serves primarily to retain the bar against its .back rest. The type-bar springs 1' act also to insure disengagement ofthe bars from the type-bar guide should there be any tendency for the bars to stick therein. A type-bar guide of ordinary construction is indicated at (Z, Fig. 1.

A type-bar spring, having the general mode of operation described and falling within this invention considered in its broader aspects, may no doubt be constructed and arranged dii'lerently from those illuscase attached to the bars above their pivots.

I claim as my invention: 1. In a typewriting machine, a coiled spring for actuating a type-bar, normally under no tension and extended and under,

tension as the type bar reaches the printing point.

' 2. In a typewriting machine, a spring for actuating a type-bar being slidable or movable longitudinally and also elastically extensible longitudinally. l

3 In a typewriting machine, a type-bar spring longitudinally elastical and having a slidable portion integral With the elastic portion.

4. In a typewriting machine, a spring permanently in connection with the type bar and exerting no force on the retractionof a type ba'r during its travel except adjacent to the printing point.

5. In a typewriting m achine, a spring di rectly applied to the type-bar having both a 'slidingand extending movement as the typebar approaches the printing point and a sliding and contracting movement as it recedes from the printing point.

6. nation of pivoted type-bars and a spring for each type-bar to retract it from the printing point and at all times connected to the heel of the type-bar and moving therewith but exerting no influence on the return move ment of the bar exce'pt adjacent to the printing point. r I

7. In a typewriting machine, the combination with a type-bar of a slidable and extensible spring located behind the pivot of a type-bar.

8. In a typewriting machine, the combi- In a typewriting machine, the combination with a series of pivoted type-bars of a series of slidahle and extensible springs lying in segmental form and adapted to facilitate the return of a series of type-bars. l

9. In a typewriting machine, a type-bar combined, with a spring arranged with a plain portion on either end and a spiral portion between the plainportions and having one end. secured to the type-bar and the other end slidable adjustably against a stop.

10. In a typewriting machine, a type-bar combined with a retracting spring moving when the type-bar moves but exerting no front of the type-bar pivots, being in that tension on the type-bar until it is adjacent to the printing point.

1.1; In a typewriting machine, a type-bar and a spring therefor which latter moves as the type-bar moves but exerts its influence on the type-bar during a portion only of its,

13; In a typewriting machine, the combi--' nation With a type-bar of a spring for actuating it and both ends of which move at the same time throughout the major portion of the travel ol' the bar to the printing point.

14:. In a typewriting machine, the combination of a type-bar, a type-bar guide at the printing point, and a type-bar retracting spring brought into ellectiveaction during the latter part only of the advance movement of the type-bar.

15. In a typewriting machine, the combination with a type-bar and a slid able extensible springilocated behind the pivot of thetype-bar and placed under tension during the latter part only of the advance movement of the type-bar of a typebar guide located adjacent the printing point.

16. In a typewriting machine, a type-bar combined witha retracting spring moving when the type-bar moves but exerting no tension on the type-bar until itisl adjacent to the printing point and a; typebar' ,guide adjacent the printing point;

In a 'typewrxtmg machine, combination of a type-bar, a tvpebar actuatin device acting under-tensile strain to pul the type-bar to effect the printing stroke, and a spring placed under tensile strain during the latter part only of the stroke of the-typebar and acting to pull it away from the printing point. r

In testimony whereof, I have hereunto subscribed my name.

EDWARD B. HESS. Witnesses: v r

L. F. BROWNING, E. F. Wrens.

printing '5 

